Best Age Calculator — Your Exact Age, Live to the Second

The best age calculator is one that shows your exact age live — down to the second — and works for any birth year. BornClock calculates your age in years, months, days, hours, minutes, and seconds in real time, runs entirely in your browser, and never stores your date of birth.

Our age calculator is precise to the second. It accounts for leap years, varying month lengths, and your local time zone using the JavaScript Date specification, so results match what an astronomer or actuary would compute.

Yes. Enter your date of birth and we display your age simultaneously in years, months, days, hours, minutes, and seconds — and the seconds counter ticks live as you watch.

Yes, the age calculator is 100% free with no sign-up required. Premium features like the shareable infographic and life-expectancy report are optional.

Yes. The calculator supports any birth year from 1900 to the current year and works correctly for ages from 0 to 120+.